$ git clone -n https://src.fedoraproject.org/rpms/golang-github-kardianos-service.git /var/lib/mock/f45-build-12141-439/root/chroot_tmpdir/scmroot/golang-github-kardianos-service
Cloning into '/var/lib/mock/f45-build-12141-439/root/chroot_tmpdir/scmroot/golang-github-kardianos-service'...
$ git fetch origin 14c78457c8dd30b7edb0fd97b8cecc30c0d16ca6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-kardianos-service
 * [new ref]         14c78457c8dd30b7edb0fd97b8cecc30c0d16ca6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14c7845 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild