$ git clone -n https://src.fedoraproject.org/rpms/perl-Rose-DB.git /var/lib/mock/f41-build-side-1-3125852-39500/root/chroot_tmpdir/scmroot/perl-Rose-DB
Cloning into '/var/lib/mock/f41-build-side-1-3125852-39500/root/chroot_tmpdir/scmroot/perl-Rose-DB'...
$ git fetch origin 1bde4b5cf46d62a097fe69ee334132ecc7687f08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Rose-DB
 * [new ref]         1bde4b5cf46d62a097fe69ee334132ecc7687f08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1bde4b5 update to version 0.786