$ git clone -n https://src.fedoraproject.org/rpms/dummy-test-package-gloster.git /var/lib/mock/f40-build-2226273-52918/root/chroot_tmpdir/scmroot/dummy-test-package-gloster
Cloning into '/var/lib/mock/f40-build-2226273-52918/root/chroot_tmpdir/scmroot/dummy-test-package-gloster'...
$ git fetch origin cebbae99ccc9d84f1fce6e1095be9dcec9b69848:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dummy-test-package-gloster
 * [new ref]           cebbae99ccc9d84f1fce6e1095be9dcec9b69848 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cebbae99 Bump release