$ git clone -n https://src.fedoraproject.org/rpms/R-parsedate.git /var/lib/mock/f43-build-side-110352-58908127-6569187/root/chroot_tmpdir/scmroot/R-parsedate
Cloning into '/var/lib/mock/f43-build-side-110352-58908127-6569187/root/chroot_tmpdir/scmroot/R-parsedate'...
$ git fetch origin 8bddf0f75dfb82168986bc96a1e47f6c4370bc97:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-parsedate
 * [new ref]         8bddf0f75dfb82168986bc96a1e47f6c4370bc97 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8bddf0f R-maint-sig mass rebuild