$ git clone -n https://src.fedoraproject.org/rpms/perl-FileHandle-Fmode.git /var/lib/mock/f43-perl-60947913-6586617/root/chroot_tmpdir/scmroot/perl-FileHandle-Fmode
Cloning into '/var/lib/mock/f43-perl-60947913-6586617/root/chroot_tmpdir/scmroot/perl-FileHandle-Fmode'...
$ git fetch origin a1298868da4467630be4e49ca8bc9e1695f775ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-FileHandle-Fmode
 * [new ref]         a1298868da4467630be4e49ca8bc9e1695f775ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a129886 Perl 5.42 rebuild