$ git clone -n https://src.fedoraproject.org/rpms/perl-YAML-LibYAML.git /var/lib/mock/f41-build-854385-166859/root/chroot_tmpdir/scmroot/perl-YAML-LibYAML
Cloning into '/var/lib/mock/f41-build-854385-166859/root/chroot_tmpdir/scmroot/perl-YAML-LibYAML'...
$ git fetch origin d2d33cc5d41e03ee612a91e64d09bb59b6b6eb01:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-YAML-LibYAML
 * [new ref]         d2d33cc5d41e03ee612a91e64d09bb59b6b6eb01 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2d33cc 0.902.0 bump (rhbz#2313873)