$ git clone -n https://src.fedoraproject.org/rpms/golang-github-emersion-sasl.git /var/lib/mock/f45-build-11889-435/root/chroot_tmpdir/scmroot/golang-github-emersion-sasl
Cloning into '/var/lib/mock/f45-build-11889-435/root/chroot_tmpdir/scmroot/golang-github-emersion-sasl'...
$ git fetch origin 9d4e4d46d38d13b939404e40a8db8d3afb3ed983:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-emersion-sasl
 * [new ref]         9d4e4d46d38d13b939404e40a8db8d3afb3ed983 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d4e4d4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild