$ git clone -n https://src.fedoraproject.org/rpms/qt-jdenticon.git /var/lib/mock/f45-build-34000-676/root/chroot_tmpdir/scmroot/qt-jdenticon
Cloning into '/var/lib/mock/f45-build-34000-676/root/chroot_tmpdir/scmroot/qt-jdenticon'...
$ git fetch origin bc0f406ba731926bd3bf9e0c65686c5b62173e9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt-jdenticon
 * [new ref]         bc0f406ba731926bd3bf9e0c65686c5b62173e9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc0f406 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild