$ git clone -n https://src.fedoraproject.org/rpms/libksieve.git /var/lib/mock/f42-build-864145-172187/root/chroot_tmpdir/scmroot/libksieve
Cloning into '/var/lib/mock/f42-build-864145-172187/root/chroot_tmpdir/scmroot/libksieve'...
$ git fetch origin b54c153b15cf416dcb423d7ffc496c0e3e258f16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libksieve
 * [new ref]         b54c153b15cf416dcb423d7ffc496c0e3e258f16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b54c153 24.12.0