$ git clone -n https://src.fedoraproject.org/rpms/golang-github-prometheus-common.git /var/lib/mock/f40-build-2422909-60590/root/chroot_tmpdir/scmroot/golang-github-prometheus-common
Cloning into '/var/lib/mock/f40-build-2422909-60590/root/chroot_tmpdir/scmroot/golang-github-prometheus-common'...
$ git fetch origin 851d318708616810bb16e8a6df834dfc4b489c45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-prometheus-common
 * [new ref]         851d318708616810bb16e8a6df834dfc4b489c45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 851d318 Update to 0.46.0 - Closes rhbz#2258298