$ git clone -n https://src.fedoraproject.org/rpms/perl-YAML-LibYAML-API.git /var/lib/mock/f45-build-27605-625/root/chroot_tmpdir/scmroot/perl-YAML-LibYAML-API
Cloning into '/var/lib/mock/f45-build-27605-625/root/chroot_tmpdir/scmroot/perl-YAML-LibYAML-API'...
$ git fetch origin 7e4b89c2cd1505121fa5384056e7f89105815d90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-YAML-LibYAML-API
 * [new ref]         7e4b89c2cd1505121fa5384056e7f89105815d90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e4b89c Perl 5.44 rebuild