$ git clone -n https://src.fedoraproject.org/rpms/oniguruma.git /var/lib/mock/f45-build-20941-576/root/chroot_tmpdir/scmroot/oniguruma
Cloning into '/var/lib/mock/f45-build-20941-576/root/chroot_tmpdir/scmroot/oniguruma'...
$ git fetch origin 71120ad005cdcd58349c6591d82fb4a70b6eaa68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oniguruma
 * [new ref]         71120ad005cdcd58349c6591d82fb4a70b6eaa68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71120ad Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild