$ git clone -n https://src.fedoraproject.org/rpms/golang-github-alecthomas-kingpin2.git /var/lib/mock/f45-build-11708-434/root/chroot_tmpdir/scmroot/golang-github-alecthomas-kingpin2
Cloning into '/var/lib/mock/f45-build-11708-434/root/chroot_tmpdir/scmroot/golang-github-alecthomas-kingpin2'...
$ git fetch origin c4c942bbd5eb36a891335baffb3c19facd8b9346:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-alecthomas-kingpin2
 * [new ref]         c4c942bbd5eb36a891335baffb3c19facd8b9346 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4c942b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild