$ git clone -n https://src.fedoraproject.org/rpms/pptp.git /var/lib/mock/f45-build-28878-633/root/chroot_tmpdir/scmroot/pptp
Cloning into '/var/lib/mock/f45-build-28878-633/root/chroot_tmpdir/scmroot/pptp'...
$ git fetch origin bcc1541a66fd3c1286a5a52574b672344613fbaf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pptp
 * [new ref]         bcc1541a66fd3c1286a5a52574b672344613fbaf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcc1541 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild