$ git clone -n https://src.fedoraproject.org/rpms/glycin-loaders.git /var/lib/mock/f40-build-2685505-68021/root/chroot_tmpdir/scmroot/glycin-loaders
Cloning into '/var/lib/mock/f40-build-2685505-68021/root/chroot_tmpdir/scmroot/glycin-loaders'...
$ git fetch origin 27ccb6f1ac0fe0fc7b3bedf2faac4d21963a18cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glycin-loaders
 * [new ref]         27ccb6f1ac0fe0fc7b3bedf2faac4d21963a18cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27ccb6f Update to version 1.0.1; Fixes RHBZ#2272614