$ git clone -n https://src.fedoraproject.org/rpms/amanda.git /var/lib/mock/f39-build-1657436-40565/root/chroot_tmpdir/scmroot/amanda
Cloning into '/var/lib/mock/f39-build-1657436-40565/root/chroot_tmpdir/scmroot/amanda'...
$ git fetch origin 0102d7f8353603edb24675be5178ebac46adbff8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/amanda
 * [new ref]         0102d7f8353603edb24675be5178ebac46adbff8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0102d7f Add sources.