$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Cover.git /var/lib/mock/f39-build-1874217-42726/root/chroot_tmpdir/scmroot/perl-Devel-Cover
Cloning into '/var/lib/mock/f39-build-1874217-42726/root/chroot_tmpdir/scmroot/perl-Devel-Cover'...
$ git fetch origin dbc5404270003c8fef10027977738d21b1e72d98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Cover
 * [new ref]         dbc5404270003c8fef10027977738d21b1e72d98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbc5404 Rebuild for Perl 5.38.2