$ git clone -n https://src.fedoraproject.org/rpms/perl-Promise-XS.git /var/lib/mock/f45-build-25934-613/root/chroot_tmpdir/scmroot/perl-Promise-XS
Cloning into '/var/lib/mock/f45-build-25934-613/root/chroot_tmpdir/scmroot/perl-Promise-XS'...
$ git fetch origin 2336224299d18c07ee950ea4b34136511c6d415c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Promise-XS
 * [new ref]         2336224299d18c07ee950ea4b34136511c6d415c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2336224 Perl 5.44 rebuild