$ git clone -n https://src.fedoraproject.org/rpms/perl-Event.git /var/lib/mock/f45-build-23402-597/root/chroot_tmpdir/scmroot/perl-Event
Cloning into '/var/lib/mock/f45-build-23402-597/root/chroot_tmpdir/scmroot/perl-Event'...
$ git fetch origin 5d171b0e5d2bd7ac9d14c6ae6c485e638d23b212:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Event
 * [new ref]         5d171b0e5d2bd7ac9d14c6ae6c485e638d23b212 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d171b0 Perl 5.44 rebuild