$ git clone -n https://src.fedoraproject.org/rpms/htop.git /var/lib/mock/f45-build-13486-451/root/chroot_tmpdir/scmroot/htop
Cloning into '/var/lib/mock/f45-build-13486-451/root/chroot_tmpdir/scmroot/htop'...
$ git fetch origin 34725ad1521ebc38322a2d74abf6b599000d37f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/htop
 * [new ref]         34725ad1521ebc38322a2d74abf6b599000d37f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34725ad Update to 3.5.3