$ git clone -n https://src.fedoraproject.org/rpms/perl-Devel-Cover.git /var/lib/mock/f45-build-23078-595/root/chroot_tmpdir/scmroot/perl-Devel-Cover
Cloning into '/var/lib/mock/f45-build-23078-595/root/chroot_tmpdir/scmroot/perl-Devel-Cover'...
$ git fetch origin 9a4d377f743736ca6d9ad7b3e4b853d83a569e05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Devel-Cover
 * [new ref]         9a4d377f743736ca6d9ad7b3e4b853d83a569e05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a4d377 Perl 5.44 rebuild