$ git clone -n https://src.fedoraproject.org/rpms/golang-github-masterminds-vcs.git /var/lib/mock/f45-build-12209-439/root/chroot_tmpdir/scmroot/golang-github-masterminds-vcs
Cloning into '/var/lib/mock/f45-build-12209-439/root/chroot_tmpdir/scmroot/golang-github-masterminds-vcs'...
$ git fetch origin 128a16310adae0953aa01720e72bdc5c4664f11a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-masterminds-vcs
 * [new ref]         128a16310adae0953aa01720e72bdc5c4664f11a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 128a163 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild