$ git clone -n https://src.fedoraproject.org/rpms/rust-whoami.git /var/lib/mock/f39-build-1546890-36703/root/chroot_tmpdir/scmroot/rust-whoami
Cloning into '/var/lib/mock/f39-build-1546890-36703/root/chroot_tmpdir/scmroot/rust-whoami'...
$ git fetch origin 65265461ae746ec0b1e2d3d7241fa244e0090c89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-whoami
 * [new ref]         65265461ae746ec0b1e2d3d7241fa244e0090c89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6526546 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild