$ git clone -n https://src.fedoraproject.org/rpms/cosmic-greeter.git /var/lib/mock/f45-build-5593-340/root/chroot_tmpdir/scmroot/cosmic-greeter
Cloning into '/var/lib/mock/f45-build-5593-340/root/chroot_tmpdir/scmroot/cosmic-greeter'...
$ git fetch origin bc010c25f679416058bc6e3616dd5887d244f66f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-greeter
 * [new ref]         bc010c25f679416058bc6e3616dd5887d244f66f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc010c2 Update to 1.6.0