$ git clone -n https://src.fedoraproject.org/rpms/shadow-utils.git /var/lib/mock/f40-build-2041572-48445/root/chroot_tmpdir/scmroot/shadow-utils
Cloning into '/var/lib/mock/f40-build-2041572-48445/root/chroot_tmpdir/scmroot/shadow-utils'...
$ git fetch origin b2b4416387c3424380e5efcaa20e1a100406b8e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shadow-utils
 * [new ref]         b2b4416387c3424380e5efcaa20e1a100406b8e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2b4416 useradd: Set proper SELinux labels for def_usrtemplate