$ git clone -n https://src.fedoraproject.org/rpms/gnet2.git /var/lib/mock/f45-build-11338-429/root/chroot_tmpdir/scmroot/gnet2
Cloning into '/var/lib/mock/f45-build-11338-429/root/chroot_tmpdir/scmroot/gnet2'...
$ git fetch origin dc24f6c42043c0124a9457477ccf701964bd4074:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnet2
 * [new ref]         dc24f6c42043c0124a9457477ccf701964bd4074 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc24f6c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild