$ git clone -n https://src.fedoraproject.org/rpms/rust-data-encoding-macro.git /var/lib/mock/f41-build-1197386-22342/root/chroot_tmpdir/scmroot/rust-data-encoding-macro
Cloning into '/var/lib/mock/f41-build-1197386-22342/root/chroot_tmpdir/scmroot/rust-data-encoding-macro'...
$ git fetch origin c36b92717037580499b2c2aabe503663e82c6e77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-data-encoding-macro
 * [new ref]         c36b92717037580499b2c2aabe503663e82c6e77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c36b927 Update to version 0.1.15; Fixes RHBZ#2277588