$ git clone -n https://src.fedoraproject.org/rpms/njam.git /var/lib/mock/f39-build-1625915-39219/root/chroot_tmpdir/scmroot/njam
Cloning into '/var/lib/mock/f39-build-1625915-39219/root/chroot_tmpdir/scmroot/njam'...
$ git fetch origin 372200453fae51f22c87e4777fb387b0914935d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/njam
 * [new ref]         372200453fae51f22c87e4777fb387b0914935d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3722004 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild