$ git clone -n https://src.fedoraproject.org/rpms/policycoreutils.git /var/lib/mock/f40-build-734592-105976/root/chroot_tmpdir/scmroot/policycoreutils
Cloning into '/var/lib/mock/f40-build-734592-105976/root/chroot_tmpdir/scmroot/policycoreutils'...
$ git fetch origin 4b1f77eef98d40a4419c883ef3e964cbb63154c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/policycoreutils
 * [new ref]         4b1f77eef98d40a4419c883ef3e964cbb63154c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b1f77e policycoreutils-3.5-8