$ git clone -n https://src.fedoraproject.org/rpms/golang-github-davecgh-spew.git /var/lib/mock/f45-build-11852-435/root/chroot_tmpdir/scmroot/golang-github-davecgh-spew
Cloning into '/var/lib/mock/f45-build-11852-435/root/chroot_tmpdir/scmroot/golang-github-davecgh-spew'...
$ git fetch origin 69ada009b4847505cd6b092dcd9c899853898cbb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-davecgh-spew
 * [new ref]         69ada009b4847505cd6b092dcd9c899853898cbb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 69ada00 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild