$ git clone -n https://src.fedoraproject.org/rpms/libast.git /var/lib/mock/f40-build-784679-133496/root/chroot_tmpdir/scmroot/libast
Cloning into '/var/lib/mock/f40-build-784679-133496/root/chroot_tmpdir/scmroot/libast'...
$ git fetch origin 7d175b7ff02b7410570c6dc8820cefe2aa36a5d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libast
 * [new ref]         7d175b7ff02b7410570c6dc8820cefe2aa36a5d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d175b7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild