$ git clone -n https://src.fedoraproject.org/rpms/git-remote-hg.git /var/lib/mock/f39-build-1523709-36014/root/chroot_tmpdir/scmroot/git-remote-hg
Cloning into '/var/lib/mock/f39-build-1523709-36014/root/chroot_tmpdir/scmroot/git-remote-hg'...
$ git fetch origin 3e2ec637c89242586c582d8c7ce6515acf5e3d71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git-remote-hg
 * [new ref]         3e2ec637c89242586c582d8c7ce6515acf5e3d71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e2ec63 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild