$ git clone -n https://src.fedoraproject.org/rpms/rust-data-encoding-macro-internal.git /var/lib/mock/f39-build-1526245-36059/root/chroot_tmpdir/scmroot/rust-data-encoding-macro-internal
Cloning into '/var/lib/mock/f39-build-1526245-36059/root/chroot_tmpdir/scmroot/rust-data-encoding-macro-internal'...
$ git fetch origin 3055abbd19b4ad9e86ab44cb7059570584c41b39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-data-encoding-macro-internal
 * [new ref]         3055abbd19b4ad9e86ab44cb7059570584c41b39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3055abb Update to version 0.1.11; Fixes RHBZ#2208774