$ git clone -n https://src.fedoraproject.org/rpms/golang-github-jlaffaye-ftp.git /var/lib/mock/f39-build-1442529-32472/root/chroot_tmpdir/scmroot/golang-github-jlaffaye-ftp
Cloning into '/var/lib/mock/f39-build-1442529-32472/root/chroot_tmpdir/scmroot/golang-github-jlaffaye-ftp'...
$ git fetch origin b16a8ba12298c5d812ff65a6add10e0748126129:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-jlaffaye-ftp
 * [new ref]         b16a8ba12298c5d812ff65a6add10e0748126129 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b16a8ba Update to 0.2.0 - Closes rhbz#2243671