$ git clone -n https://src.fedoraproject.org/rpms/rubygem-test-unit-notify.git /var/lib/mock/f45-build-35376-695/root/chroot_tmpdir/scmroot/rubygem-test-unit-notify
Cloning into '/var/lib/mock/f45-build-35376-695/root/chroot_tmpdir/scmroot/rubygem-test-unit-notify'...
$ git fetch origin 5dafb226a42b5e54de358eb6a0a44edb73ab3d76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-test-unit-notify
 * [new ref]         5dafb226a42b5e54de358eb6a0a44edb73ab3d76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5dafb22 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild