$ git clone -n https://src.fedoraproject.org/rpms/golang-x-exp.git /var/lib/mock/f45-build-12795-443/root/chroot_tmpdir/scmroot/golang-x-exp
Cloning into '/var/lib/mock/f45-build-12795-443/root/chroot_tmpdir/scmroot/golang-x-exp'...
$ git fetch origin ecf51cbb7b790bec4caf74df64ca75508bae81cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-exp
 * [new ref]         ecf51cbb7b790bec4caf74df64ca75508bae81cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ecf51cb Update to commit 764159d