$ git clone -n https://src.fedoraproject.org/rpms/libnxz.git /var/lib/mock/f40-build-785833-134127/root/chroot_tmpdir/scmroot/libnxz
Cloning into '/var/lib/mock/f40-build-785833-134127/root/chroot_tmpdir/scmroot/libnxz'...
$ git fetch origin 3f5cd64ef2651fa1d05a0ac6832cf37a8e1b1ef2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnxz
 * [new ref]         3f5cd64ef2651fa1d05a0ac6832cf37a8e1b1ef2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f5cd64 Fix build with GCC 14