$ git clone -n https://src.fedoraproject.org/rpms/tcputils.git /var/lib/mock/f45-build-36897-709/root/chroot_tmpdir/scmroot/tcputils
Cloning into '/var/lib/mock/f45-build-36897-709/root/chroot_tmpdir/scmroot/tcputils'...
$ git fetch origin 46acd2e46160baeebbcaa3cfde76e3b363a86e51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tcputils
 * [new ref]         46acd2e46160baeebbcaa3cfde76e3b363a86e51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46acd2e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild