$ git clone -n https://src.fedoraproject.org/rpms/libacars.git /var/lib/mock/f40-build-741527-110242/root/chroot_tmpdir/scmroot/libacars
Cloning into '/var/lib/mock/f40-build-741527-110242/root/chroot_tmpdir/scmroot/libacars'...
$ git fetch origin 238834324735a8a1ba34d997b37b5a84d0c2c3ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libacars
 * [new ref]         238834324735a8a1ba34d997b37b5a84d0c2c3ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2388343 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild