$ git clone -n https://src.fedoraproject.org/rpms/perl-Event-Lib.git /var/lib/mock/f41-build-714894-13069/root/chroot_tmpdir/scmroot/perl-Event-Lib
Cloning into '/var/lib/mock/f41-build-714894-13069/root/chroot_tmpdir/scmroot/perl-Event-Lib'...
$ git fetch origin fb9c48f930586225413de6dc6690ccb2a000fb0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Event-Lib
 * [new ref]         fb9c48f930586225413de6dc6690ccb2a000fb0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb9c48f Eliminate use of obsolete %patchN syntax (#2283636)