$ git clone -n https://src.fedoraproject.org/rpms/perl-CommonMark.git /var/lib/mock/f43-perl-60950351-6586682/root/chroot_tmpdir/scmroot/perl-CommonMark
Cloning into '/var/lib/mock/f43-perl-60950351-6586682/root/chroot_tmpdir/scmroot/perl-CommonMark'...
$ git fetch origin da6755ce2e92e68b945b2a0d76e52bf3c8c91bc2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CommonMark
 * [new ref]         da6755ce2e92e68b945b2a0d76e52bf3c8c91bc2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da6755c Perl 5.42 rebuild