$ git clone -n https://src.fedoraproject.org/rpms/golang-github-prometheus-common.git /var/lib/mock/f40-build-2709294-71607/root/chroot_tmpdir/scmroot/golang-github-prometheus-common
Cloning into '/var/lib/mock/f40-build-2709294-71607/root/chroot_tmpdir/scmroot/golang-github-prometheus-common'...
$ git fetch origin 79334d2355211aa68349194315c21d378ec6ce6f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-prometheus-common
 * [new ref]         79334d2355211aa68349194315c21d378ec6ce6f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79334d2 Update to 0.48.0 - Closes rhbz#2264460