$ git clone -n https://src.fedoraproject.org/rpms/sendmail.git /var/lib/mock/f41-build-1049367-19179/root/chroot_tmpdir/scmroot/sendmail
Cloning into '/var/lib/mock/f41-build-1049367-19179/root/chroot_tmpdir/scmroot/sendmail'...
$ git fetch origin b50d0f4087a3f8d4942b89deef3676c013f87b73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sendmail
 * [new ref]         b50d0f4087a3f8d4942b89deef3676c013f87b73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b50d0f4 Eliminate use of obsolete %patchN syntax (#2283636)