$ git clone -n https://src.fedoraproject.org/rpms/golang-github-apache-thrift.git /var/lib/mock/f40-build-2262191-54473/root/chroot_tmpdir/scmroot/golang-github-apache-thrift
Cloning into '/var/lib/mock/f40-build-2262191-54473/root/chroot_tmpdir/scmroot/golang-github-apache-thrift'...
$ git fetch origin 4fcb7b8cce0aaf2b3b38ba309b3b42bab62eadc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-apache-thrift
 * [new ref]         4fcb7b8cce0aaf2b3b38ba309b3b42bab62eadc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4fcb7b8 Update to 0.19.0