$ git clone -n https://src.fedoraproject.org/rpms/kf5-kfilemetadata.git /var/lib/mock/f41-build-815468-149534/root/chroot_tmpdir/scmroot/kf5-kfilemetadata
Cloning into '/var/lib/mock/f41-build-815468-149534/root/chroot_tmpdir/scmroot/kf5-kfilemetadata'...
$ git fetch origin cbc137d4af86310d303cd7afcb5f1d48c8c1df75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kfilemetadata
 * [new ref]         cbc137d4af86310d303cd7afcb5f1d48c8c1df75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cbc137d Rebuilt for exiv2 0.28.2