$ git clone -n https://src.fedoraproject.org/rpms/expect.git /var/lib/mock/f41-build-884565-16596/root/chroot_tmpdir/scmroot/expect
Cloning into '/var/lib/mock/f41-build-884565-16596/root/chroot_tmpdir/scmroot/expect'...
$ git fetch origin ab77450d84d8fa37784abb8a4d4f7572d37536a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/expect
 * [new ref]         ab77450d84d8fa37784abb8a4d4f7572d37536a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab77450 Eliminate use of obsolete %patchN syntax (#2283636)