$ git clone -n https://src.fedoraproject.org/rpms/golang-github-bradfitz-smtpd.git /var/lib/mock/f37-build-side-33-golang-devel-112364-5963/root/chroot_tmpdir/scmroot/golang-github-bradfitz-smtpd
Cloning into '/var/lib/mock/f37-build-side-33-golang-devel-112364-5963/root/chroot_tmpdir/scmroot/golang-github-bradfitz-smtpd'...
$ git reset --hard 3ee476e03d05fdfd7ffd7da75b55945383ced6f0
HEAD is now at 3ee476e SPEC cleanup