$ git clone -n https://src.fedoraproject.org/rpms/arb.git /var/lib/mock/f40-build-2145464-50880/root/chroot_tmpdir/scmroot/arb
Cloning into '/var/lib/mock/f40-build-2145464-50880/root/chroot_tmpdir/scmroot/arb'...
$ git fetch origin bfbc758a77baeb01cc476bb21f692fc621bf180c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arb
 * [new ref]         bfbc758a77baeb01cc476bb21f692fc621bf180c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfbc758 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild