$ git clone -n https://src.fedoraproject.org/rpms/pgpdump.git /var/lib/mock/f45-build-27815-626/root/chroot_tmpdir/scmroot/pgpdump
Cloning into '/var/lib/mock/f45-build-27815-626/root/chroot_tmpdir/scmroot/pgpdump'...
$ git fetch origin 85b35a985063695f1dd4f637a47e6e23a0b96089:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pgpdump
 * [new ref]         85b35a985063695f1dd4f637a47e6e23a0b96089 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85b35a9 Update to 0.37