$ git clone -n https://src.fedoraproject.org/rpms/git-remote-hg.git /var/lib/mock/f45-build-11082-426/root/chroot_tmpdir/scmroot/git-remote-hg
Cloning into '/var/lib/mock/f45-build-11082-426/root/chroot_tmpdir/scmroot/git-remote-hg'...
$ git fetch origin ea3b1e2b76701cb8405b3fc8a5d73a2c7202f5ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git-remote-hg
 * [new ref]         ea3b1e2b76701cb8405b3fc8a5d73a2c7202f5ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea3b1e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild