$ git clone -n https://src.fedoraproject.org/rpms/perl-Crypt-RC4-XS.git /var/lib/mock/f45-build-22654-593/root/chroot_tmpdir/scmroot/perl-Crypt-RC4-XS
Cloning into '/var/lib/mock/f45-build-22654-593/root/chroot_tmpdir/scmroot/perl-Crypt-RC4-XS'...
$ git fetch origin c97f251e8d8f54dc434407f0083b6f989e22539d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Crypt-RC4-XS
 * [new ref]         c97f251e8d8f54dc434407f0083b6f989e22539d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c97f251 Perl 5.44 rebuild