$ git clone -n https://src.fedoraproject.org/rpms/libacars.git /var/lib/mock/f40-build-786117-134180/root/chroot_tmpdir/scmroot/libacars
Cloning into '/var/lib/mock/f40-build-786117-134180/root/chroot_tmpdir/scmroot/libacars'...
$ git fetch origin 7abe0f25d146d2b93e013e4587a04458f23b2d6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libacars
 * [new ref]         7abe0f25d146d2b93e013e4587a04458f23b2d6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7abe0f2 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild