$ git clone -n https://src.fedoraproject.org/rpms/gearhead2.git /var/lib/mock/f39-build-2096655-50404/root/chroot_tmpdir/scmroot/gearhead2
Cloning into '/var/lib/mock/f39-build-2096655-50404/root/chroot_tmpdir/scmroot/gearhead2'...
$ git fetch origin b52ef6dbe6e14effb53be32edff93fd049f4825a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gearhead2
 * [new ref]         b52ef6dbe6e14effb53be32edff93fd049f4825a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b52ef6d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild