$ git clone -n https://src.fedoraproject.org/rpms/perl-Sys-MemInfo.git /var/lib/mock/f45-build-26358-617/root/chroot_tmpdir/scmroot/perl-Sys-MemInfo
Cloning into '/var/lib/mock/f45-build-26358-617/root/chroot_tmpdir/scmroot/perl-Sys-MemInfo'...
$ git fetch origin 010ffec26e3414966fade8856e9cd161f468c968:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sys-MemInfo
 * [new ref]         010ffec26e3414966fade8856e9cd161f468c968 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 010ffec Perl 5.44 rebuild