$ git clone -n https://src.fedoraproject.org/rpms/apt.git /var/lib/mock/f39-build-1535767-36247/root/chroot_tmpdir/scmroot/apt
Cloning into '/var/lib/mock/f39-build-1535767-36247/root/chroot_tmpdir/scmroot/apt'...
$ git fetch origin b590519a223891e4aabdf600f2975f5c2d5adbba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/apt
 * [new ref]         b590519a223891e4aabdf600f2975f5c2d5adbba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b590519 Update to 2.7.6 (#2239816)