$ git clone -n https://src.fedoraproject.org/rpms/gearhead2.git /var/lib/mock/f42-build-3347394-45004/root/chroot_tmpdir/scmroot/gearhead2
Cloning into '/var/lib/mock/f42-build-3347394-45004/root/chroot_tmpdir/scmroot/gearhead2'...
$ git fetch origin 3886f7a43cf24abc669cd48fc22331362d362094:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gearhead2
 * [new ref]         3886f7a43cf24abc669cd48fc22331362d362094 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3886f7a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild