$ git clone -n https://src.fedoraproject.org/rpms/libmash.git /var/lib/mock/f39-build-1457915-33023/root/chroot_tmpdir/scmroot/libmash
Cloning into '/var/lib/mock/f39-build-1457915-33023/root/chroot_tmpdir/scmroot/libmash'...
$ git fetch origin ec1eba11cc7d077a755ac799c80cfc92da6b9eaf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmash
 * [new ref]         ec1eba11cc7d077a755ac799c80cfc92da6b9eaf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec1eba1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild