$ git clone -n https://src.fedoraproject.org/rpms/perl-EV.git /var/lib/mock/f45-build-23248-596/root/chroot_tmpdir/scmroot/perl-EV
Cloning into '/var/lib/mock/f45-build-23248-596/root/chroot_tmpdir/scmroot/perl-EV'...
$ git fetch origin 3f217986ac4d7504a015f2a27e1a652ebc540776:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-EV
 * [new ref]         3f217986ac4d7504a015f2a27e1a652ebc540776 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f21798 Perl 5.44 rebuild