$ git clone -n https://src.fedoraproject.org/rpms/libfm-qt.git /var/lib/mock/f42-build-side-1-3501267-45974/root/chroot_tmpdir/scmroot/libfm-qt
Cloning into '/var/lib/mock/f42-build-side-1-3501267-45974/root/chroot_tmpdir/scmroot/libfm-qt'...
$ git fetch origin f3101286eb4e59f3fbfb15ced89fe4ab312a77d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfm-qt
 * [new ref]         f3101286eb4e59f3fbfb15ced89fe4ab312a77d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f310128 Rebuild (qt6)