$ git clone -n https://src.fedoraproject.org/rpms/perl-YAML.git /var/lib/mock/f45-build-27627-625/root/chroot_tmpdir/scmroot/perl-YAML
Cloning into '/var/lib/mock/f45-build-27627-625/root/chroot_tmpdir/scmroot/perl-YAML'...
$ git fetch origin 56ce3f337920b4f4b059f9f3a0121d3998b621bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-YAML
 * [new ref]         56ce3f337920b4f4b059f9f3a0121d3998b621bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56ce3f3 1.321 bump